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Photosynthesis<br />Nick Gotshall<br />

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What is Photosynthesis?<br />Takes Place in Plant’s Leaves<br />Series of Reactions in Plant Cells <br />Conversion of Light Energy<br />Provides Chemical Energy<br />Base of Almost All Food Chains<br />

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The “Typical” Plant Cell<br />Eudicot<br />Genetic material <br />membrane bound organelles<br />Cell Wall<br />Vacuole<br />Chloroplasts<br />

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Overall Reaction<br />CO2 + H2O sunlight Sugar + O2<br /> Chlorophyll<br />Chlorophyll and sunlight must be present<br />Takes place in a series of two reactions<br />Light reaction=first<br />Calvin Cycle=second<br />

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Light Reaction<br />Dependent upon presence of sunlight (photons)<br />Takes place in chloroplasts (thylakoid)<br />Transfers Electrons in four reactions<br />Overall Reaction <br />H2O sunlight/chlorophyll O2 + ATP + NADPH<br />

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Light Reaction Continued<br />Produces …<br />Oxygen (O2)<br />Chemical Energy to fuel Calvin Cycle<br />ATP<br />NADPH<br />

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Calvin Cycle<br />Takes place in chloroplasts (stroma)<br />Formerly “Dark Reaction”<br />Does not require photons<br />Requires products of light reaction<br />Produces usable energy in series of reactions<br />Sugar<br />

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Importance of Photosynthesis<br />Provides base for almost all food chains<br />May have been initial means for evolution<br />Waste from photosynthesis is oxygen<br />Leads to increased biodiversity<br />

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Human Uses for Plants<br />Food<br />Raw materials <br />Fuel<br />Clothing<br />Currency<br />The List is endless!<br />

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Review; Photosynthesis…<br />Takes place in plant’s leaves<br />Happens in chloroplasts in plant cell<br />Photosynthesis converts photons into sugar<br />Light reaction<br />Dark reaction<br />Very important for everyone!<br />

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Work Cited<br />Slide 2<br />http://www.pdphoto.org/PictureDetail.php?mat=&pg=5528. Leaf- 2003-01-05.<br />Slide 4<br />http://www.flickr.com/photos/skitzitilby/1242020466/. under the horsechestnut tree enjoying peace and quiet <br />Slide 8<br />http://www.butler.edu/herbarium/treeid/photosynthesis.jpg.<br />Slide 10<br />http://www.flickr.com/photos/elena_norbiato/2444950911/. Fruits and Colors.<br />